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采用固体粉末渗硅法在Cr18Ni9奥氏体不锈钢表面获得了致密的渗层,应用SEM和EDS等方法分析了渗硅层及其精细结构。结果表明,用w(Si)=70%的硅铁粉末为基体,二氧化硅为松散剂,氟化钠为活化剂,在1050℃密封扩散处理4～6 h,可在Cr18Ni9奥氏体不锈钢表面获得厚度在50μm以上的渗硅层,渗层结构致密,其精细结构为调幅分解产物,由表及里的精细程度与硅原子的梯度分布有关。
Using solid powder silicon infiltration method in Cr18Ni9 austenitic stainless steel surface to obtain a dense layer, the application of SEM and EDS analysis of the silicon layer and its fine structure. The results show that with silicon (Si) = 70% ferrosilicon powder as the matrix, silica as a loose agent, sodium fluoride as an activator, sealing and diffusion treatment at 1050 ℃ for 4 ~ 6 h can be used in Cr18Ni9 austenitic stainless steel Surface thickness of 50μm above the osmosis layer, the diffusion layer structure, the fine structure of the amplitude modulation decomposition products, from the table and the fineness of the silicon atom gradient distribution.